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|Title:||Fundamental characteristics of sorption, swelling, and permeation of P84 Co-polyimide membranes for pervaporation dehydration of alcohols|
|Citation:||Qiao, X., Chung, T.-S. (2005-11-09). Fundamental characteristics of sorption, swelling, and permeation of P84 Co-polyimide membranes for pervaporation dehydration of alcohols. Industrial and Engineering Chemistry Research 44 (23) : 8938-8943. ScholarBank@NUS Repository. https://doi.org/10.1021/ie050836g|
|Abstract:||An in-depth study of sorption, swelling, and permeation of aqueous ethanol, 2-propanol (IPA), and tert-butyl alcohol through BTDA-TDI/MDI (P84) co-polyimide membranes has been conducted. The superior separation performance toward aqueous IPA and tert-butyl alcohol mixtures mainly arises from four factors: (1) rigid P84 chains with a small d-space, (2) the lesser affinity between P84 and IPA as well as between P84 and tert-butyl alcohol, (3) a high sorption selectivity, and (4) steric hindrance induced by bulky IPA and tert-butyl alcohol molecules. However, because of severe chain swelling and relaxation in ethanol/water solutions as confirmed by XRD and DSC, P84 performs less impressively for the pervaporation dehydration of ethanol/water mixtures. © 2005 American Chemical Society.|
|Source Title:||Industrial and Engineering Chemistry Research|
|Appears in Collections:||Staff Publications|
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